(22-37) If an electron (m=9.1×10^−31kg) escaped from the surface of the inner cylinder in Problem 3

(22-37) If an electron (m=9.1×10^−31kg) escaped from the surface of the inner cylinder in Problem 36 (Fig. 35) with negligible speed, what would be its speed when it reached the outer cylinder? If a proton (m=1.67×10^−27kg) evolves in a circular orbit of radius r=7.0cm about the axis (ie, between the cylinders), what must be its speed?